I was unable to confirm whether Edward Shillito (1872-1948) was actually a soldier during World War I or only writing from the perspective of one. In any case, he lived during the horrors of the Great War and published this poem in its wake, in 1919.

“Jesus of the Scars” by Edward Shillito

If we have never sought, we seek Thee now;
Thine eyes burn through the dark, our only stars;
We must have sight of thorn-pricks on Thy brow,
We must have Thee, O Jesus of the Scars.